Jon S.

11/02/20

Statistics Chi-Square Goodness of Fit Question

You intend to conduct a goodness-of-fit test for a distribution with 4 categories. You collect data from 64 subjects.What are the degrees of freedom for the χ2 distribution for this test?d.f. =... more

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Statistics

11/02/20

Statistics, Probability, Normal distribution

Given a normal distribution where mu = 72 and sigma = 6, what is the probability that (please show all work and corresponding Z values):a.) X>68b.) X<65 or X>75c.) 10% of the values are... more

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Probability

11/02/20

given a standard normal disturbution

Given a standard normal distribution, find the probablitiy of:a. less than -0.59b. between -0.73 and 1.45

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Statistics

11/02/20

Let X be a normally distributed random variable with mean µ = 20 and standard deviation σ = 10. Find xL and xR symmetric with respect to X such that (a) P(xL < X < xR) = 0.75 (b) P(xL < X < xR) = 0.84

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Statistics

11/02/20

Let X be a normally distributed random variable with mean µ = 20 and standard deviation σ = 10. Find x ∗ satisfying each. (a) P(X < x∗ ) = 0.73 (b) P(X > x∗ ) = 0.59

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Statistics

11/02/20

1. Find the z-score z ∗ for each. (a) P(z < z∗ ) = 0.47 (b) P(z > z∗ ) = 0.82

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Statistics

11/01/20

I need help finding the median

Suppose that a category of world class runners are known to run a marathon (26 miles) in an average of 143 minutes with a standard deviation of 14 minutes. Consider 49 of the races.Let x̅ = the... more

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Geometry

11/01/20

Plzzzz! Help ASAP

Point P is on segment AB such that AP: PB is 2:5. If A has coordinates (-8, -2) and B has coordinates (6, 19), determine and state the coordinates of P. Point P is on segment AB such that AP: PB... more

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Vocabulary

11/01/20

Oxymoron vs paradox

A good stressful stress reliever—is this a paradox or an oxymoron?

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Math Statistics Probability

10/31/20

Need help finding the probability

"Suppose that a category of world class runners are known to run a marathon (26 miles) in an average of 143 minutes with a standard deviation of 14 minutes. Consider 49 of the races" Let X = the... more

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Algebra 2

10/31/20

Part 3: CHOOSE 2 problems from this Part! Factor each and find all zeros

1) f (x) = x 4 + 125x 2) f (x) = x 4 + 5x 3 + 4x 2 + 20x3) f (x) = x 4 - x 3 - 2x 2 + 2x 4) f (x) = x 4 - 8x

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Math Statistics

10/31/20

What's the distribution of x̅ ?

Suppose that a category of world class runners are known to run a marathon (26 miles) in an average of 143 minutes with a standard deviation of 14 minutes. Consider 49 of the races.Let X = the... more

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Statistics

10/31/20

Can someone help walk me through solving this problem? I keep getting it wrong

In 1940 the average size of a U.S. farm was 174 acres. Let's say that the standard deviation was 51 acres. Suppose we randomly survey 45 farmers from 1940 I need help solving the question... more

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Geometry

10/31/20

<jkl if m<j is seven less than m<l and m<k is 21 less than twice m<l find the measure of each angle

Find the measure of each angle

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Geometry

10/31/20

In <pqr if m<p is 14 less than five times x m<q is five less than x and m<r is nine less than twice x find x and the measures of each angle

Find x and the measure of each angle

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Math Geometry

10/31/20

write the equation of the line that passes through (-1,1) and is perpendicular to the line that passes through the points (2,4) and (-4,6)

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Statistics

10/31/20

z score statitsics

The electric cooperative needs to know the mean household usage of electricity by its non-commercial customers in kWh per day. Assume that the population standard deviation is kWh. The mean... more

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Algebra 1

10/31/20